"Resist today, resist tomorrow.. resist until the last Dominion soldier has been driven from our soil!"
This was great.
Another favorite of mine is in Improbable Cause.
The entire scene, beginning to end, where Odo is in a cave talking to his contact. We don't see his face but we hear his awesome voice. I love how the nodding of his head (we see his eyes) don't quite
match to what he is saying, because it makes us feel more disconnected. Not only does this develop Odo as a character, but in this scene, the canvas for DS9 expands to epic proportions. It's now about the entire quadrant. It's an awesome scene